How to unlock all Elite armour permutations on HALO 3

i have changed the comments settings so that now it allow comments automatically, thank you very much to every one that has posted on the video, iam glad i have been able to help so many of you in getting the armour sets that you want. :)
april 10th 2010.

How to unlock all Elite armour permutations on
HALO 3

Combat Helmet - Unlocked by default
Combat Shoulders - Unlocked by default
Combat Body - Unlocked by default

Assault Helmet - Unlocked by default
Assault Shoulders - Unlocked by default
Assault Body - Unlocked by default

Flight Helmet - Complete Campaign Heroic, or Legendary
Flight Shoulders - Complete The Ark on Heroic, or Legendary
Flight Body - Complete Tsavo Highway on Heroic, or Legendary

Ascetic Helmet - Unlock "Steppin' Razor" Achievement
Ascetic Shoulders -Unlock "Overkill" Achievement
Ascetic Body - Unlock "Up Close and Personal" Achievement

Commando Helmet - Unlock "Overkill" Achievement
Commando Shoulders - Unlocked by default after Auto Update 1 as of February 19, 2008. Originally "Steppin' Razor" Achievement was required to unlock this piece
Commando Body - Unlock "Triple Kill" Achievement